A TempleOS distro for heretics
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250 lines
6.0 KiB

U0 LoadOneImport(U8 **_src,U8 *module_base,I64 ld_flags)
{
U8 *src=*_src,*ptr2,*st_ptr;
I64 i,etype;
CHashExport *tmpex=NULL;
CHashImport *tmpiss;
Bool first=TRUE;
while (etype=*src++) {
i=*src(U32 *)++;
st_ptr=src;
src+=StrLen(st_ptr)+1;
if (*st_ptr) {
if (!first) {
*_src=st_ptr-5;
return;
} else {
first=FALSE;
if (!(tmpex=HashFind(st_ptr,
Fs->hash_table,HTG_ALL-HTT_IMPORT_SYS_SYM))) {
if (!(ld_flags & LDF_SILENT))
"Unresolved Reference:%s\n",st_ptr;
tmpiss=CAlloc(sizeof(CHashImport));
tmpiss->str=StrNew(st_ptr);
tmpiss->type=HTT_IMPORT_SYS_SYM;
tmpiss->module_header_entry=st_ptr-5;
tmpiss->module_base=module_base;
HashAdd(tmpiss,Fs->hash_table);
}
}
}
if (tmpex) {
ptr2=module_base+i;
if (tmpex->type & HTT_FUN)
i=tmpex(CHashFun *)->exe_addr;
else if (tmpex->type & HTT_GLBL_VAR)
i=tmpex(CHashGlblVar *)->data_addr;
else
i=tmpex->val;
switch (etype) {
case IET_REL_I8: *ptr2(U8 *) =i-ptr2-1; break;
case IET_IMM_U8: *ptr2(U8 *) =i; break;
case IET_REL_I16: *ptr2(U16 *)=i-ptr2-2; break;
case IET_IMM_U16: *ptr2(U16 *)=i; break;
case IET_REL_I32: *ptr2(U32 *)=i-ptr2-4; break;
case IET_IMM_U32: *ptr2(U32 *)=i; break;
case IET_REL_I64: *ptr2(I64 *)=i-ptr2-8; break;
case IET_IMM_I64: *ptr2(I64 *)=i; break;
}
}
}
*_src=src-1;
}
U0 SysSymImportsResolve(U8 *st_ptr,I64 ld_flags)
{
CHashImport *tmpiss;
U8 *ptr;
while (tmpiss=HashSingleTableFind(st_ptr,
Fs->hash_table,HTT_IMPORT_SYS_SYM)) {
ptr=tmpiss->module_header_entry;
LoadOneImport(&ptr,tmpiss->module_base,ld_flags);
tmpiss->type=HTT_INVALID;
}
}
U0 LoadPass1(U8 *src,U8 *module_base,I64 ld_flags)
{
U8 *ptr2,*ptr3,*st_ptr;
I64 i,j,cnt,etype;
CHashExport *tmpex=NULL;
while (etype=*src++) {
i=*src(U32 *)++;
st_ptr=src;
src+=StrLen(st_ptr)+1;
switch (etype) {
case IET_REL32_EXPORT:
case IET_IMM32_EXPORT:
case IET_REL64_EXPORT:
case IET_IMM64_EXPORT:
tmpex=CAlloc(sizeof(CHashExport));
tmpex->str=StrNew(st_ptr);
tmpex->type=HTT_EXPORT_SYS_SYM|HTF_IMM;
if (etype==IET_IMM32_EXPORT||etype==IET_IMM64_EXPORT)
tmpex->val=i;
else
tmpex->val=i+module_base;
HashAdd(tmpex,Fs->hash_table);
SysSymImportsResolve(st_ptr,ld_flags);
break;
case IET_REL_I0...IET_IMM_I64:
src=st_ptr-5;
LoadOneImport(&src,module_base,ld_flags);
break;
case IET_ABS_ADDR:
if (ld_flags & LDF_NO_ABSS)
src+=i*sizeof(U32);
else {
cnt=i;
for (j=0;j<cnt;j++) {
ptr2=module_base+*src(U32 *)++;
*ptr2(U32 *)+=module_base;
}
}
break;
start:
case IET_CODE_HEAP:
ptr3=MAlloc(*src(I32 *)++,Fs->code_heap);
break;
case IET_ZEROED_CODE_HEAP:
ptr3=CAlloc(*src(I32 *)++,Fs->code_heap);
break;
end:
if (*st_ptr) {
tmpex=CAlloc(sizeof(CHashExport));
tmpex->str=StrNew(st_ptr);
tmpex->type=HTT_EXPORT_SYS_SYM|HTF_IMM;
tmpex->val=ptr3;
HashAdd(tmpex,Fs->hash_table);
}
cnt=i;
for (j=0;j<cnt;j++) {
ptr2=module_base+*src(U32 *)++;
*ptr2(I32 *)+=ptr3;
}
break;
start:
case IET_DATA_HEAP:
ptr3=MAlloc(*src(I64 *)++);
break;
case IET_ZEROED_DATA_HEAP:
ptr3=CAlloc(*src(I64 *)++);
break;
end:
if (*st_ptr) {
tmpex=CAlloc(sizeof(CHashExport));
tmpex->str=StrNew(st_ptr);
tmpex->type=HTT_EXPORT_SYS_SYM|HTF_IMM;
tmpex->val=ptr3;
HashAdd(tmpex,Fs->hash_table);
}
cnt=i;
for (j=0;j<cnt;j++) {
ptr2=module_base+*src(U32 *)++;
*ptr2(I64 *)+=ptr3;
}
break;
}
}
}
U0 LoadPass2(U8 *src,U8 *module_base,I64)
{
U8 *st_ptr;
I64 i,etype;
while (etype=*src++) {
i=*src(U32 *)++;
st_ptr=src;
src+=StrLen(st_ptr)+1;
switch (etype) {
case IET_MAIN:
Call(i+module_base);
break;
case IET_ABS_ADDR:
src+=sizeof(U32)*i;
break;
case IET_CODE_HEAP:
case IET_ZEROED_CODE_HEAP:
src+=4+sizeof(U32)*i;
break;
case IET_DATA_HEAP:
case IET_ZEROED_DATA_HEAP:
src+=8+sizeof(U32)*i;
break;
}
}
}
CBinFile *Load(U8 *filename,I64 ld_flags=0,CBinFile *bfh_addr=INVALID_PTR)
{//Load a .BIN file module into memory.
//bfh_addr==INVALID_PTR means don't care what load addr.
U8 *fbuf,*module_base,*absname;
I64 size,module_align,misalignment;
CBinFile *bfh;
fbuf=ExtDft(filename,"BIN.Z");
if (!(bfh=FileRead(fbuf,&size))) {
Free(fbuf);
return NULL;
}
//See $LK,"Patch Table Generation",A="FF:::/Compiler/CMain.HC,IET_ABS_ADDR"$
module_align=1<<bfh->module_align_bits;
if (!module_align || bfh->bin_signature!=BIN_SIGNATURE_VAL) {
Free(bfh);
Free(fbuf);
throw('BinModul');
}
if (bfh_addr==INVALID_PTR) {
if (bfh->org==INVALID_PTR) {
misalignment=module_align-sizeof(CBinFile);
if (misalignment<0)
misalignment&=module_align-1;
if (Fs->code_heap!=Fs->data_heap) {
if (module_align<16)
module_align=16;
bfh_addr=MAllocAligned(size,module_align,Fs->code_heap,misalignment);
} else if (module_align>8)
bfh_addr=MAllocAligned(size,module_align,,misalignment);
else {//Less than 2Gig system memory
bfh_addr=bfh;
goto lo_skip; //File is already in code heap area, don't copy.
}
} else
bfh_addr=bfh->org;
}
MemCpy(bfh_addr,bfh,size);
Free(bfh);
lo_skip:
module_base=bfh_addr(U8 *)+sizeof(CBinFile);
absname=FileNameAbs(fbuf);
Free(fbuf);
fbuf=StrNew(absname);
FileExtRem(fbuf);
if (fbuf[1]==':' && StrLen(fbuf)>2)
HashGenericAdd(fbuf+2,HTT_MODULE|HTF_PUBLIC,bfh_addr);
LoadPass1(bfh_addr(U8 *)+bfh_addr->patch_table_offset,module_base,ld_flags);
if (!(ld_flags&LDF_JUST_LOAD))
LoadPass2(bfh_addr(U8 *)+bfh_addr->patch_table_offset,module_base,ld_flags);
Free(absname);
Free(fbuf);
return bfh_addr;
}
U0 LoadKernel()
{
HashGenericAdd(KERNEL_MODULE_NAME,HTT_MODULE|HTF_PUBLIC,
mem_boot_base-sizeof(CBinFile));
//Abs patches done here $LK,"CPatchTableAbsAddr",A="FF:D:/Kernel/KStart32.HC,CPatchTableAbsAddr"$.
LoadPass1(sys_boot_patch_table_base,mem_boot_base,LDF_NO_ABSS|LDF_SILENT);
//No main routines
// LoadPass2(sys_boot_patch_table_base,mem_boot_base,0);
}